Method add

regex/src/dfa.rs:1691–1698

Allocates room for one additional state and returns a pointer to it. If there's no more room, None is returned.

(&mut self)

    ///
    /// If there's no more room, None is returned.
    fn add(&mut self) -> Option<StatePtr> {
        let si = self.table.len();
        if si > STATE_MAX as usize {
            return None;
        }
        self.table.extend(repeat(STATE_UNKNOWN).take(self.num_byte_classes));
        Some(usize_to_u32(si))
    }

    /// Clears the table of all states.
    fn clear(&mut self) {